粗糙面散射物理光学近似条件中的曲率修正

Modification of the curvature in physical optics approximation for rough surface scattering

根据粗糙面的一阶导数和二阶导数相关理论 ,对粗糙面散射物理光学近似条件中的经典曲率计算方法进行了修正 ,它适用于自然界中的大多数粗糙面的曲率计算 .同时还得到了工程上较易计算的零阶、一阶和二阶的曲率修正近似公式 ,对物理光学近似条件下均方根斜率较小时的曲率修正近似公式进行了分析 .

Based on the coherence theorem of the first and second derivatives of the surface, the traditional method for computing the curvature of the rough surface in physical optics approximation is modified, which can apply to a variety of natural surfaces. The modified formulae which are easy for engineering computing are also obtained under zero order, first order and second order approximations, with particular attention paid to the modified formulae for the relevant small slope regime in physical optics approximation.